Invest with £2500?

I have £2500 in my isa earning 5.33%, which is quite nice, but i would obviously like some more interest. can i change isa or will i have to wait till next april, i would invest in the stock market, but that is quite shaky at the moment, so does anyone have any nice ideas?
Answer
Hi you can change isa at any time go to a range of banks and building societies and find the best rate then swap